{"id":208017,"date":"2025-07-08T12:37:56","date_gmt":"2025-07-08T04:37:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208017\/"},"modified":"2025-07-08T12:37:56","modified_gmt":"2025-07-08T04:37:56","slug":"go-%e5%8d%b3%e4%bd%bf%e8%ae%be%e7%bd%ae%e4%ba%86-not-null%ef%bc%8cmysql-%e4%b9%9f%e4%bc%9a%e6%8f%92%e5%85%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208017\/","title":{"rendered":"Go – \u5373\u4f7f\u8bbe\u7f6e\u4e86 NOT NULL\uff0cMySQL \u4e5f\u4f1a\u63d2\u5165"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go – \u5373\u4f7f\u8bbe\u7f6e\u4e86 NOT NULL\uff0cMySQL \u4e5f\u4f1a\u63d2\u5165<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-27 22:18:32<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662fGolang\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aGo – \u5373\u4f7f\u8bbe\u7f6e\u4e86 NOT NULL\uff0cMySQL \u4e5f\u4f1a\u63d2\u5165\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u4f7f\u7528 mysql \u5728 go \u4e2d\u7f16\u5199\u7b80\u5355\u7684 api\uff0c\u4f46\u6211\u7684 mysql \u4ee3\u7801\u5c06\u6570\u636e\u63d2\u5165\u884c\uff0c\u5373\u4f7f\u5217\u8bbe\u7f6e\u4e3a not null<\/code>\u3002\u8fd9\u662f\u6211\u7684\u4ee3\u7801\uff1a<\/p>\n

\u67b6\u6784.sql<\/p>\n

create table if not exists seller (\n    seller_id int not null auto_increment,\n    name varchar(255) not null unique,\n    contact varchar(255) not null,\n    street varchar(255) not null,\n    city varchar(255) not null,\n    nip varchar(255) not null unique,\n    bank varchar(255) not null,\n    account_number varchar(255) not null unique,\n    primary key (seller_id)\n);<\/pre>\n
\u6570\u636e\u5e93\/mysql\/invoice.go<\/p>\n
func (r *invoicerepository) createseller(seller *invoice.seller) error {\n        query := \"insert into seller (name, contact, street, city, nip, bank, account_number) values (?, ?, ?, ?, ?, ?, ?)\"\n        stmt, err := r.db.prepare(query)\n        if err != nil {\n                log.errorf(\"unable to create seller %s: %v\", seller.sellername, err)\n                return err\n        }\n\n        res, err := stmt.exec(&seller.sellername, &seller.sellercontact, &seller.sellerstreet, &seller.sellercity, &seller.sellernip, &seller.sellerbank, &seller.selleraccountnumber)\n        if err != nil {\n                log.errorf(\"error while creating seller: %v\", err)\n                return err\n        }\n\n        newid, err := res.lastinsertid()\n        if err != nil {\n                log.errorf(\"error while getting inserted id: %v\", err)\n                return err\n        }\n\n        log.infof(\"created seller %s [id=%d]\", seller.sellername, newid)\n        return nil\n}<\/pre>\n
\u73b0\u5728\uff0c\u5f53\u6211\u4f7f\u7528\u552f\u4e00\u7684 seller_name \u53d1\u51fa post \u8bf7\u6c42\uff08\u4f7f\u7528 httpie\uff09\u65f6\uff0c\u5373\u4f7f\u5217\u4e3a\u7a7a\uff0c\u6211\u7684\u4ee3\u7801\u4e5f\u4f1a\u521b\u5efa\u884c\u3002\u5b83\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a http post localhost:8000\/api\/seller\/create seller_name=testt<\/code><\/p>\n
\u8fd9\u662f\u6211\u7684\u884c\u5728\u8868\u4e2d\u7684\u6837\u5b50\uff1a<\/p>\n
+-----------+-------+---------+--------+------+-----+------+----------------+\n| seller_id | name  | contact | street | city | nip | bank | account_number |\n+-----------+-------+---------+--------+------+-----+------+----------------+\n|         1 | testt |         |        |      |     |      |                |\n+-----------+-------+---------+--------+------+-----+------+----------------+<\/pre>\n
\u6211\u4e0d\u77e5\u9053\u6211\u54ea\u91cc\u505a\u9519\u4e86\u3002<\/p>\n
\u7f16\u8f91\uff08\u6dfb\u52a0\u6a21\u578b\uff09<\/p>\n
type Seller struct {\n        SellerID            int64  `json:\"seller_id\"`\n        SellerName          string `json:\"seller_name\"`\n        SellerContact       string `json:\"seller_contact\"`\n        SellerStreet        string `json:\"seller_street\"`\n        SellerCity          string `json:\"seller_city\"`\n        SellerNIP           string `json:\"seller_nip\"`\n        SellerBank          string `json:\"seller_bank\"`\n        SellerAccountNumber string `json:\"seller_account_number\"`\n}<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
go \u4e0d\u4f1a\u5728\u8868\u4e2d\u63d2\u5165 null<\/code>s\uff0c\u800c\u662f\u63d2\u5165\u7a7a\u5b57\u7b26\u4e32\u3002\u60a8\u7684\u4ee3\u7801\u6b63\u5728\u6709\u6548\u5730\u6267\u884c\u6b64\u64cd\u4f5c\uff1a<\/p>\n
seller := seller{}\nseller.sellername = \"testt\"<\/pre>\n
\u521b\u5efa\u60a8\u8981\u63d2\u5165\u7684 seller<\/code>\u3002\u56e0\u6b64\uff0cseller<\/code> \u4e2d\u9664 sellername<\/code> \u4e4b\u5916\u7684\u6240\u6709\u5b57\u6bb5\u7684\u7c7b\u578b\u503c\u90fd\u4e3a\u96f6\uff1b\u7ed9\u4f60\u5e26\u6765\u9ebb\u70e6\u7684\u5b57\u6bb5\u662f string<\/code>s \u5e76\u4e14 string<\/code> \u7684\u96f6\u503c\u662f \"\"<\/code> \uff08\u5373\u7a7a\u5b57\u7b26\u4e32\uff09\uff0c\u56e0\u6b64 sql \u6700\u7ec8\u770b\u8d77\u6765\u50cf\uff1a<\/p>\n
INSERT INTO seller (name, contact, ...)\nVALUES ('testt', '', ...)<\/pre>\n
\u5e76\u4e14\u770b\u4e0d\u5230 null\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u5728 go \u4e2d\u9a8c\u8bc1\u4f20\u5165\u6570\u636e\uff0c\u4ee5\u4fbf\u62d2\u7edd\u7a7a\u5b57\u7b26\u4e32\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 \u4ee3\u66ff string<\/code> \u5e76\u8ba9\u6570\u636e\u5e93\u5904\u7406 null<\/code>s \uff08\u5047\u8bbe mysql \u914d\u7f6e\u6b63\u786e\uff09\uff0c\u6216\u8005\u4e24\u8005\u90fd\u6267\u884c\u3002<\/p>\n
\u662f\u7684\uff0c\u56e0\u4e3a\u8bf4\u5230mysql\uff1a \u7a7a\u5b57\u7b26\u4e32\uff08\u4f8b\u5982\u201c\u201d\uff09\u4e0d\u662f\u7a7a\u503c\u3002 \u5b83\u628a\u5b83\u5f53\u4f5c\u4e00\u4e2a\u5b57\u7b26\u4e32\uff08\u53ea\u662f\u7a7a\uff09\u3002<\/p>\n
\u672c\u7bc7\u5173\u4e8e\u300aGo – \u5373\u4f7f\u8bbe\u7f6e\u4e86 NOT NULL\uff0cMySQL \u4e5f\u4f1a\u63d2\u5165\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208017","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208017","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208017"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208017\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}